Adjustable chair



(No Model.)

0, H. KNIGHT. ADJUSTABLE CHAIR.

No. 516,493. Patented Mar. 13, '1894.

I #aATTOHNEYS. K

WITNESSES:

m! NAMNAL LH'NOGMPHING COMPANY,

WAlHmaTnN. u. c.

I STATES NTTE CHARLES H. KNIGHT, OF RONDOUT, ASSIGNOR TO THE NATIONALCHAIR MANUFACTURING COMPANY, OF CHICHEsTER, NEW YORK.

ADJ USTABLE CHAIR.

SPECIFICATION forming part of Letters Patent No.516,493, dated March 13,1894. I

Application filedAprilZl, 1893. SerialNo.4'71,264. (No model.)

To aZZ- whom it may concern:

Be it known that I, OHAELEs H. KNIGHT, of Rondout, Ulster county, Stateof New York, have invented an Improvementin Adjustable Chairs, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, in which-- Figure 1 is a side view ofmyimproved adjustable chair. Fig. 2 is a plan detail showing the slidihgframe for the foot-rest. Fig. 3 is a plan detail showing the adjustingmeans for the head rest. Fig. 4 is a side view in detail showing theposition the extension arms assume when the back is raised. Fig. 5 is asectional detail on the line 5-5 Fig. 1. Fig. 6 shows in detail the endof the sliding frame to which the links f are attached.

My invention relates to that class of easy or invalid chairs, whereinthe foot-rest and various other parts move to accommodate themselves tothe various positions assumed by the person occupying the chair, whenitis adjusted in different positions; and my invention consists in thearrangement and combination of parts hereinafter described and claimed.

In the drawings A represents a side framing of the stationary portion ofmy improved chair, to which is attached the arm rest a.

B represents the back of the'chair, which is pivoted at a point abovethe lower end to the stationary sides A of the chair, as shown at b.

The rear of a seat 0 is pivotally connected to the lower end of thechair-back B, as shown at c, the forward end of said seat beingpivotally connected to the sides d of the leg-rest D, as shown at 6,below their upper ends, while the upper ends of said side pieces (1 arepivoted to the stationary framing A, as shown at an. By this meansthe'back B can be lowered without the slightest exertion, causing theseat to be raised or moved upward and forward and the leg-rest D to beraised, as shown in dotted lines in Fig. 1.

E designates a foot-rest which is connected by pivoted arms or links fto a sliding frame 9 carried by the leg-rest D. Pivoted to the links fof the foot-rest, is a notched bar h adapted to be secured at differentpoints in its length by placing one of the notches therein over a pin 6secured to the sliding frame 9 of the foot-rest is attached at k achain, rope or other flexible connection j; the other end of said ropeor chain, after having been preferably passed over a pulley Z carried bythe seat 0 or frame A, is secured to an arm mextending down from theback of the chair belowits pivot. It willbe seen that as the chairbackis raised, the foot-rest will be drawn up by the chain j attached to thesliding frame g, and that as the chair-back is lowered the foot-restwill be allowed to descend, thus making it conform to the difierentpositions assumed by the occupant of the chair.

at designates the extension-arms of the chair which are pivoted to thearms a as shown at 0 and are connected to the back of the chair by meansof the links 1). When the back of the chair is in an upright position,the extension-arms coincide with and form part of the back (as shown inFig. 4), but when the back is lowered, the arms u come into play asextension-arms, as shown in Fig. 1.

F is an adjustable head-rest provided with a curved arm g on each sidethereof, which arm terminates in a lug r. These armsqform supports forthe head-rest and are adapted to protrude through and be held infrictional,

contact in any of a series of openings sin the chair-back by a spring 25attached at one end to the back of the chair and at the other end to thehead-rest F. The lug r on the end of each arm q prevents it from beingreadily withdrawn from the openings s without first releasing the springt. It will be seen that by this adjusting means I am enabled to placethe head-rest at any desirable point on the chair and can, on account ofthe curvature of the arms, adjust it at any angle; furthermore, thatsaid rest can be readily removed when it is desired to dispense with theuse thereof.

I deem of especial importance the direct rope or chain connectionbetween the sliding frame of the foot-rest, and the back, since by thismeans I am enabled to produce a simple, reliable and effective device,which will IOC be self-adjusting. For, if the occupant of the chairleans back, he will not only bring the back to the required inclination,but will also at the same time extend the distance between the front ofthe seat and the foot-rest. As he straightens in his seat and raises thechairback, the foot-rest will be correspondingly drawn up. In otherwords the chair-back and the foot-rest being connected (by the chainconnection j) a movement of one will allow or cause a movement of theother, thus a press i said foot-rest and with the back B of the chair,

whereby when the back B is raised the footrest will be drawn up,substantially as and for the purposes set forth.

2. In an adjustable chair, the combination with the pivoted back B, seatC and leg-rest D, of a movable frame g carrying an adj ustable foot-restE, chain j connected to said movable frame g, and to an arm m extendingfrom the chair-back B, substantially as and for the purpose specified.

3. In an adjustable chair, the combination rests n with the back of thechair, whereby the extension arm-rests are maintained parallel with thechair-back when the same is in an inclined position and coincide withand form part of said back when the same is in an uprightposition,substantiallyas described.

4. The combination of a chair-back having slots 3 therein, removablehead-rest F having curved arms q connected therewith for supporting thesame, said curved arms being adapted to protrude through and be held infrictional contact in the slots .9 of the chairback by spring t, as andfor the purposes described.

5. In an adjustable chair, the combination of the back 13, seat 0,leg-rest D, movable footrest E carried by said leg-rest, flexibleconnection j, connected with said foot-rest, and with the chair-back 1Band extension armrests 9t, so arranged that they are parallel with thechair-back, when the same is in an inclined position and coincide withandform part of said back when the same is in an upright position, asand for the purpose specifled.

CHAS. H. KNIGHT.

Witnesses:

CHARLES BRAY, WILLARD VAN KEUREN.

